html,
body {
    height: 100%;
}

body {
    padding: 0;
    margin: 0;
}

.el-container {
    height: 100%;
}

.el-header {
    background-color: #545c64;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header_left {
    display: flex;
    align-items: center;
}

.el-menu {
    border: none;
}

.el-header .header_left img {
    width: 100px;
    height: 50px;
}

.header_left span {
    margin-left: 15px;
}

.el-aside {
    background-color: slategrey;
    width: 200px;
}

.el-submenu {
    background-color: #333744;
    widows: 200px;
}

.el-main {
    background-color: white;
}